Finding the Fourth Proportional to 157,899.80, 217,901.76 and 85,302.70
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Solution
The fourth proportional to 157,899.80, 217,901.76 and 85,302.70 is: 117,717.75
Step by Step Solution
- Step 1: Write the proportion equation
157,899.80 : 217,901.76 = 85,302.70 : x - Step 2: Convert to fraction form
157,899.80/217,901.76 = 85,302.70/x - Step 3: Cross multiply
157,899.80x = 217,901.76 × 85,302.70 - Step 4: Simplify right side
157,899.80x = 18,587,608,462.75 - Step 5: Solve for x
x = 18,587,608,462.75/157,899.80 - Step 6: Final answer
x = 117,717.75
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.